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1. The buffer tank increases water capacity of the system, which can reduce the numbers of starts and extend life of the compressor.

There are too little water in a central air conditioning system without a butter tank. When it begins to work, the air conditioner will heat the water to the set temperature in a very short time. Then it will stop working. The hot water will be cold very soon so the air conditioner has to start working again. Frequent starts and stops will greatly reduce the life of compressor and wast much energy as well.

If there is a buffer tank in the air conditioning system, the water temperature becomes more stable, the times of starts and stops become less, and the life of compressor becomes longer.

First of all, it's completely normal for the out-door unit of your air-water heat pump to be covered by frost or light ice during cold winters. Before it becoming too heavy, your heat pump will go into the defrost mode to remove the coating of frost or ice.

When the defrost function does not work accurately any more, your air-water heat pump could be frosted/iced/freeze up abnormally and can not defrost well. Your heat pump will lost its heating capacity. The performance, why and what-to-do for abnormal frosting/icing/freezing are listed below:

Household central air conditioners are more and more popularized for they are more comfortable than common spitted household air conditioners. While the installation of a household central AC system is much more complicated. You need to know these tips when you plan to add a new central AC system to your house:

1. Central Air Conditioners are fitted to big houses, not fitted to small apartments. Because the indoor units need to be concealed installed on the top, the central AC system need a lot of space. Those house with the height less than 2.7 miles are not good for a central AC system.

There are various of valves in a heat pump water heating system. The features and functions of different valves are not same. So it's important to know them clearly.

1. Gate Valve

Features: Also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired.

There're a lot of impurities in tap water and dust in ambient air. So air-water heat pumps need to be cleaned periodically. Or the working performance will be brought down and life span will be shortened. Cleaning is one of the most important part of maintenance for air source heat pumps.

Before you start to clean your heat pumps, remember power off the heat pump system. There are 4 parts in your heat pump system which need to be cleaned periodically:

1) Filter. Take off the filter at the water pipe system. Wash the filter net to remove impurities. Then put the filter back.

When you are trying to find the right air source heat pump unit for your own home or business, it is important to pay close attention to the heat pump’s climate class ratings. Different types of heat pumps will have better results in different parts of the world, so you need to make sure that you are getting the right kind of air source heat pump unit that matches your climate needs. There are three different climate class ratings when it comes to air source heat pumps. These three ratings are T1, T2, and T3. Let’s take a closer look at what these ratings mean and what they mean for your air source heat pump selections.

With a WellFort monobloc domestic air to water heat pump, you can easily have a super energy-saving solar heat pump hybrid water heater (which combined solar water heater and heat pump water heater) like this:

1) When it's sunny days, shut off the heat pump with the control panel, and keep the solar open. So you can have enough hot water without any electric consumption;

In 2010 WellFort launched R&D of heat pumps for ultra cold climate. The heat pumps for ultra cold climates are equipped with Copland EVI (Enhanced Vapor Injection) compressors specially and applying superior heat exchange technology. This type of products can be installed in cold weather regions, such as North Europe, North America, and North China. Even if low to -20℃, the heat pumps are able to work normally and reach a COP value of 2.0. Here are some photos of our cases.

Ordinary air source heat pumps heat water to 60℃ at the most. WellFort high temperature air source heat pumps can supply 80℃ hot water for both DHW and commercial water heating. It's a large improvement.

In South Africa, you may need IEC test reports for your heat pump business. They are IEC60335-2-40 and IEC 60335-1.

What's IEC? IEC is the International Electrotechnical Commission, a not-for-profit, non-governmental organization, founded in 1906. The IEC's members are National Committees, and they appoint experts and delegates coming from industry, government bodies, associations and academia to participate in the technical and conformity assessment work of the IEC. To know more about IEC please go to IEC official website.

IEC60335-1 is for "safety of household and similar electrical appliances". The documentation of IEC60335-1 is here for reference (148 pages).

A retrofit heat pump usually means a heat pump which can be installed for an existing geyser (or an existing cylinder). This way, you can just buy a heat pump and save the money for a water storage tank.

A retrofit heat pump should be:

split type. A monobloc heat pump has an integrated water tank with it, which is not needed at all. While a retrofit heat pump is just a heat pump main unit, and your existing geyser act as its water tank.

with a built-in circulator water pump. A retrofit heat pump is heating water when water is circulating between the heat pump and the geyser. The circulator water pump is the device making water circulate. A built-in circulator water pump is the best choice, for a exterior one is too complicated for users and installers.Read more

There're dozens of heat pump suppliers in South Africa at least. Most of them are dealing with air source heat pumps (air-water heat pumps) for DHW, geyser updating, and central water heating. In South Africa there are few heat pump manufacturers. Many of the suppliers import their heat pumps from China. Some of the suppliers are dealing with products form America, Japan, and Australia.